Abstract：Research purposes: Whether the overlapping of the adjacent section of track control network( CPIII) for high － speed railway is rational or not will affect the track regularity and the computation results of checking the long and short waves of the track． Combining with the real projects，this paper researches the two main ways for the section overlapping of the tack control networks in China，offers the methods for calculation of two kinds of overlapping，compares their results，analyzes their advantages and disadvantages and explains the treatment method for the condition that the discrepancy exceeds the tolerance before the overlapping adjustment for the purpose of providing the reference to the similar projects in future．
Research conclusions: Under the condition that the coordinates discrepancy of CPⅢ points in adjacent two overlapping sections are lower than 3 mm after independent adjustment，the overlapping smooth results obtained with these two methods can meet the demand of checking the long and short waves of the track． From the angles of the survey theory，practice and application，the rigorous adjustment overlapping method is more reliable，its maneuverability of the overlapping data processing is better，and it is more available for the engineering survey．
石德斌 张 彪 王元昌 李新增. 高速铁路 CPⅢ网区段搭接数据处理研究[J]. 铁道工程学报, 2012, 29(2): 37-40.
SHI De － bin，ZHANG Biao，WANG Yuan － chang，LI Xin － zeng. Research on Sectional Overlapping Data Processing of Track Control Network for High － speed Railway. 铁道工程学报, 2012, 29(2): 37-40.
Liu Chenglong， etc． Simulated Determination of ccuracy Requirement for Control Points III Intersection Networks in High － speed Railway ［J］．Journal of Southwest Jiaotong University，2008 ( 6) : 718 －723．
Huang zhiwei， etc，Research of Lapping Methods Between Adjacent Regions for CPIII Plane Network in High － speed Railway［J］． Journal of Railway Science and Engineering，2010( 6) : 111 － 115．
Shi Debin， etc． Exploration on Surveying and Data Processing of Control Network for Ballastless Track of High － speed Railway ［J ］． Journal of Railway Engineering Society，2009( 4) : 26 － 27．
2012, Vol. 29 
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